/Engine/Source/Runtime/PakFile/Public/IPlatformFilePak.h
Finds a file in all available pak files.
Pointer to pak entry if the file was found, NULL otherwise.
bool FindFileInPakFiles ( const TCHAR * Filename, [TRefCountPtr](API\Runtime\Core\Templates\TRefCountPtr)< [FPakFile](API\Runtime\PakFile\FPakFile) > * OutPakFile, [FPakEntry](API\Runtime\PakFile\FPakEntry) * OutEntry )